Young Stars
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Envoltórios circunstelares de estrelas jovens de massa intermediária / Circumstellar envelopes of intermediate mass young stars
As estrelas Herbig Ae/Be (HAeBe) representam os objetos de massa intermediária (2-10 Msol) na pré-sequência principal. Algumas de suas propriedades físicas são pouco compreendidas até o momento. Somente o estudo conjunto das informações fornecidas em diversos comprimentos de onda pode revelar as características do material circunstelar destes objeto
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 20/09/2012
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2. Formação estelar no complexo de nuvens moleculares em Monoceros / Star Formation in the Molecular Cloud Complex in Monoceros
We compare two molecular clouds of the Monoceros Complex in order to study their physical conditions related to the early stages of star formation. The selected clouds, Rosette (RMC) and Monoceros R2 (Mon R2), are interesting regions due to their characteristics that may be confronted with the hypothesis of star formation triggered by high velocity clouds (H
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 04/05/2012
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3. Astronomia multimídia : a construção da exposição virtual "Astronomia - uma viagem inesquecível"
Teaching Astronomy is as fascinating as learning it. This motivation made possible this work about the new ways of teaching the oldest science to the young. The objective of this work is to present the fundamenting bases and the construction method of the Virtual Exposition Astronomy: An Unforgettable Voyage. The Astronomy virtual exposition wss developed si
Publicado em: 2010
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4. Selection of candidates for young planetary systems / Seleção de candidatos a sistemas planetários jovens
Os modelos atuais sobre formação planetária indicam que os planetas gasosos gigantes formam-se em escalas de tempo de ~ 10 Manos, inferiores à dos pequenos, rochosos, de ~ 30 Manos (Zuckerman &Song 2004). Um teste simples desses modelos de formação seria procurar planetas em torno de estrelas jovens de várias idades: nos sistemas mais jovens não deve
Publicado em: 2010
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5. Extrasolar planets
The first known extrasolar planet in orbit around a Sun-like star was discovered in 1995. This object, as well as over two dozen subsequently detected extrasolar planets, were all identified by observing periodic variations of the Doppler shift of light emitted by the stars to which they are bound. All of these extrasolar planets are more massive than S
The National Academy of Sciences.
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6. Magnetars
Recent x-ray observations have shown that a substantial fraction of newly born neutron stars have magnetic fields of several 1014 G. They reveal themselves as soft gamma repeaters and anomalous x-ray pulsars and may account for the missing radio pulsars in young supernova remnants.
The National Academy of Sciences.
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7. Constraints on nebular dynamics and chemistry based on observations of annealed magnesium silicate grains in comets and in disks surrounding Herbig Ae/Be stars
Understanding dynamic conditions in the Solar Nebula is the key to prediction of the material to be found in comets. We suggest that a dynamic, large-scale circulation pattern brings processed dust and gas from the inner nebula back out into the region of cometesimal formation—extending possibly hundreds of astronomical units (AU) from the sun—and t
The National Academy of Sciences.